CN202256094U - High-pressure volumetric-method gas absorption system - Google Patents
High-pressure volumetric-method gas absorption system Download PDFInfo
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- CN202256094U CN202256094U CN 201120321037 CN201120321037U CN202256094U CN 202256094 U CN202256094 U CN 202256094U CN 201120321037 CN201120321037 CN 201120321037 CN 201120321037 U CN201120321037 U CN 201120321037U CN 202256094 U CN202256094 U CN 202256094U
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Abstract
The utility model discloses a high-pressure volumetric-method gas absorption system, which comprises an absorption tank, a gas filling sub-system, a degassing sub-system, an absorption measuring sub-system and a data acquisition processing sub-system, wherein the absorption tank is used for accommodating a detection sample; the data acquisition processing sub-system comprises a data acquisition sealing cover, a data sampler and a microcomputer processing device; the data acquisition sealing cover is used for sealing the absorption tank; a high-pressure valve and a pressure sensor are arranged on the data acquisition sealing cover; the high-pressure valve is connected with a gas output end of a depressurizing tank; a signal output end of the pressure sensor is connected with a signal input end of the data sampler; and the signal output end of the data sampler is connected with the microcomputer processing device. By organically combining the gas filling sub-system, the degassing sub-system, the absorption measuring sub-system and the data acquisition processing sub-system, gas filling, degassing, absorption measurement and data acquisition processing functions can be smoothly realized. The high-pressure volumetric-method gas absorption system has a compact structure, high degree of automation and measuring accuracy, and an excellent application value, and is time-saving and labor-saving.
Description
Technical field
The utility model relates to a kind of high pressure content method gas adsorption system that absorption is measured to gas that adopted.
Background technology
The gas bearing capacity of coal directly influence the coal seam gassy what with the size of [underground, for the correct design mine ventilation, carry out gas drainage, and the normal ventilating gas of mine main is managed very big meaning is all arranged.Therefore, gas bearing capacity is the important foundation data of gaseous mine production and scientific research in the coal.
Gas in the coal exists with three kinds of states: promptly free gas, adsorption gas and absorption gas.Absorb gas amount seldom, activity is little in coal body, also has difficulties on the mensuration, so generally will not measure.The gas bearing capacity of coal (the gas amount m that the unit coal body is contained
3/ t) include only free gas and adsorption gas two parts usually.
Free gas can calculate according to the porosity and the gas pressure of coal, and adsorption gas calculates according to the absorption constant of coal.The purpose of this test is exactly to measure the gas absorption constant of coal.The gas bearing capacity of coal sample also receives factor affecting such as its moisture content, temperature and adsorption gas composition except that outside the Pass directly having with gas pressure, when using basic data, should consider suitable correction as the case may be.
Also do not have a kind of automaticity higher at present, be exclusively used in the device that gas absorption is measured.
Summary of the invention
In view of this, the purpose of the utility model provides the high pressure content method gas adsorption system that a kind of automaticity is high, easy to use, measuring accuracy is high, measuring speed is fast.
The purpose of the utility model realizes through following technical scheme:
This high pressure content method gas adsorption system comprises the adsorption tanks that are used for the splendid attire test sample, also comprises inflation subsystem, degassing subsystem, absorption measurement subsystem and data acquisition process subsystem;
Said inflation subsystem comprises the high pressure gas bottle and the jar that reduces pressure, and the gas in the said high pressure gas bottle is through decompression jar outside output;
Said degassing subsystem comprises vacuum extractor and ultra thermostat, and said vacuum extractor links with the gas delivery port of decompression jar, be used for adsorption tanks are outgased; Said ultra thermostat is used for making the adsorption tanks of the degassing to keep constant temperature;
Said absorption measurement subsystem comprises Water Tank with Temp.-controlled, high pressure absorption buret and low pressure absorption buret; High pressure absorption buret capacity can carry out the high pressure desorption gas flow and measure greater than 1000ml; Said low pressure absorption buret can carry out the quantitative determination of low pressure minimum gas adsorption-desorption, and high pressure absorption buret and low pressure absorption buret all are furnished with equilibration flask, avoid influence of atmosphere pressure;
Said data acquisition process subsystem comprises data acquisition gland bonnet, data sampler and computer processing unit; Said data acquisition gland bonnet is used for adsorption tanks are sealed; Said data acquisition gland bonnet is provided with high pressure valve and pressure transducer; Said high pressure valve is used for being connected with the gas output end of decompression jar; The signal output part of said pressure transducer is connected with the signal input part of data sampler, and the signal output part of said data sampler is connected with computer processing unit.
Further; Said vacuum extractor comprises vacuum tank road device, vacuum unit, vacuum gauge and vacuum meter; Said vacuum unit is connected to vacuum meter through vacuum diaphragm valve, the vacuum gauge that connects successively, and is connected through the gas output end of vacuum tank road device with the decompression jar;
Further, said system also comprises and is used for meausring apparatus that sample is weighed;
Further, said system also comprises drying unit;
Further, said drying unit is a vacuum drying chamber;
Further, the maintenance temperature of said ultra thermostat is 60 ℃, and the maintenance temperature of said Water Tank with Temp.-controlled is 30 ℃;
Further, said data acquisition process subsystem also comprises printing equipment.
The beneficial effect of the utility model is: the utility model organically combines through inflating subsystem, degassing subsystem, absorption measurement subsystem and each system of data acquisition process subsystem; Can realize successfully that inflation, the degassing, absorption are measured, several big functions of data acquisition process; Its compact conformation; Automaticity and measuring accuracy are high, and be time saving and energy saving, has excellent application value.
Other advantages, target and the characteristic of the utility model will be set forth in instructions subsequently to a certain extent; And to a certain extent; Based on being conspicuous to those skilled in the art, perhaps can from the practice of the utility model, obtain instruction to investigating of hereinafter.The target of the utility model and other advantages can realize and obtain through following instructions and claims.
Description of drawings
For the purpose, technical scheme and the advantage that make the utility model is clearer, will combine accompanying drawing that the utility model is done further to describe in detail below, wherein:
Accompanying drawing is the utility model structural representation.
Embodiment
Below will be with reference to accompanying drawing, the preferred embodiment of the utility model is carried out detailed description.Should be appreciated that preferred embodiment has been merely explanation the utility model, rather than in order to limit the protection domain of the utility model.
As shown in Figure 1, the high pressure content method gas adsorption system of the utility model comprises the adsorption tanks 1 that are used for the splendid attire test sample, also comprises inflation subsystem, degassing subsystem, absorption measurement subsystem and data acquisition process subsystem;
The inflation subsystem comprises the high pressure gas bottle 2 and the jar 3 that reduces pressure, and the gas in the said high pressure gas bottle is through decompression jar outside output;
Degassing subsystem comprises vacuum extractor 4 and ultra thermostat 5, and said vacuum extractor links with the gas delivery port of decompression jar, is used for adsorption tanks are outgased; The level thermostat is used for making the adsorption tanks of the degassing to keep constant temperature;
The data acquisition process subsystem comprises data acquisition gland bonnet, data sampler 7 and computer processing unit 8; Said data acquisition gland bonnet is used for adsorption tanks are sealed; Said data acquisition gland bonnet is provided with high pressure valve 9 and pressure transducer; Said high pressure valve 9 is used for being connected with the gas output end of decompression jar; The signal output part of said pressure transducer is connected with the signal input part of data sampler, and the signal output part of said data sampler is connected with computer processing unit.
Vacuum extractor comprises vacuum tank road device, vacuum unit, vacuum gauge and vacuum meter; Said vacuum unit is connected to vacuum meter through vacuum diaphragm valve, the vacuum gauge that connects successively, and is connected through the gas output end of vacuum tank road device with the decompression jar.
As further improvement, native system comprises also and is used for meausring apparatus and drying unit that sample is weighed that in the present embodiment, drying unit adopts vacuum drying chamber.
The step that employing the utility model carries out gas absorption measurement is following:
1. claim appearance
Coal sample cup to the splendid attire sample should be numbered in advance, is saved in the exsiccator.
2. oven dry
The coal sample that weighs up in the coal sample cup is placed in the vacuum drying chamber; Setting the vacuum drying chamber temperature is 80～85 ℃, starts vacuum pump and begins the degassing, when the vacuum tightness in the drying box remains on 13Pa when following; Coal sample is dried about 6h under constant temperature take out, put into the exsiccator cooling preservation immediately.
3. tinning
Oven dry and cooled coal sample should carefully be packed in the numbered adsorption tanks; The screw screw of data acquisition gland bonnet; With vernier caliper measurement jar seam height (is the slit height between adsorption tanks tank body and cover; After it has reacted the coal sample of at every turn packing into; Owing to the tightness of housing screw is different the dead space size is changed), get four equally distributed points by 90 degree during measurement, write down four jars and stitch height value H1, H2, H3, H4 and import in " coal sample essential information " module of computer processing unit.
High pressure gas gas charged into check impermeability in the adsorption tanks.
4. the degassing
Adsorption tanks are slowly opened high pressure valve, bleed off behind the high pressure gas to link with vacuum unit, degassing subsystem.Close the atmosphere valve of vacuum unit, open vacuum meter power supply and vacuum unit successively, the glass piston of rotation air-channel system is slowly opened the adsorption tanks high pressure valve then and is outgased, and after 5 minutes adsorption tanks is placed 60 ℃ of thermostatic water-circulator baths.The degassing time looks the ability of different coal samples, coal sample quantity and pump and decides, but continuous degassing 4h at least again after requiring vacuum tightness less than 4Pa.The degassing is closed the adsorption tanks high pressure valve after accomplishing, and stops the vacuum unit, and with vacuum unit and atmosphere, closes vacuum meter.
5. master data typing
After the management information of the system software of computer processing unit set, can carry out and get into the adsorption test module, continue to carry out the essential information typing.
6. low pressure adsorption test
1) after the vacuum tightness of degas system is less than 4Pa and continuous degassing 4h, adsorption tanks from 60 ℃ ultra thermostat moves into 30 ℃ Water Tank with Temp.-controlled, is continued the degassing.
2) use earlier from the outlet of the reduction valve of the pure gas bottle of high pressure and get a certain amount of after damp, connects, move up and down leveling bottle and make gas clean buret repeatedly and connect sebific duct more than three times, move down leveling bottle with lifter at last and make the about 150cm of suction in the buret with low pressure absorption buret
3Pure gas.When having used the gas path of clarifier,, increase the number of times of cleaning accordingly according to the volume size of clarifier.
3) close the adsorption tanks high pressure valve, be connected sebific duct and link to each other through the adsorption tanks of the degassing with the buret that charges into gas with through what clean.Open the buret upper piston and make it to be in the state that is connected with adsorption tanks, mobile leveling bottle makes the liquid level in the leveling bottle be consistent with liquid level in the buret, the interior liquid level scale of record buret, and this scale is the buret initial volume.Slowly open the high pressure valve of adsorption tanks then, the interior gas of buret this moment will be inhaled in the adsorption tanks, note constantly moving leveling bottle the liquid level in its liquid level and the buret is consistent.The adsorption rate of the coal sample of low pressure absorption is less than 0.5cm
3During/h, can think to have reached adsorption equilibrium.The equilibration time of low pressure absorption is looked the absorption property of coal sample and is decided, and generally needs about 8 hours.Reach move leveling bottle after the balance and make in leveling bottle liquid level and the buret water surface consistent after, read the scale of liquid level in the buret, this scale is a buret end volume.Initial volume is the methane gas volume that adsorption tanks suck with the difference that finishes volume in buret.Room temperature when writing down balance simultaneously and atmospheric pressure.
4) the low pressure absorption interface of entering software clicks the coal sample number of carrying out low pressure absorption, clicks execution low pressure and adsorbs.
At current low pressure absorption interface typing buret initial volume, and revise and finish volume.Atmospheric pressure pd (hPa of unit) and room temperature at that time during input low pressure adsorption equilibrium.
7. high pressure adsorption test
The prerequisite of high pressure adsorption test is to have only the coal sample of accomplishing the low pressure adsorption test just can carry out the high pressure adsorption test.High pressure adsorption operations step is following:
(1) related adsorption tanks of sensor and coal sample number are set
Connect sensor and be placed in 30 ℃ the Water Tank with Temp.-controlled charging into adsorption tanks behind the high pressure gas; Couple together the signal input part of pressure transducer above the adsorption tanks and data collecting instrument with communication cable; Preferably be mapped one by one, like No. 1 adsorption tanks-No. 1 pressure transducer-No. 1 input port.
(2) observation process operation
Open and analyze main frame and data collecting instrument, after the communication demonstration was normal, execution started the monitoring button, and startup monitoring button becomes and starts, and color also becomes redness by grey.And this moment corresponding x pick up button color be grey, expression waits for that on-test carries out.In computer processing unit, click the x pick up button of related adsorption tanks; The color of x pick up button becomes green by grey immediately; Represent that these adsorption tanks are monitored, this moment, the x pick up button became the x sensor--y button, the number in " y " expression equilibrium pressure force.When adsorption equilibrium, the x sensor--the y button becomes redness by green, and monitoring system is sent the newspaper song and pointed out and reached balance.The entry information dialog box collects equalized pressure simultaneously, as long as input buret reading and room temperature, atmospheric pressure add the test that can finish first equilibrium pressure force, then proceeds the test in second equilibrium pressure force.
3) method of operating during adsorption equilibrium
With taking out in the adsorption tanks self-constant temperature tank after the low pressure adsorption equilibrium and connecting with high pressure absorption buret.Saturated aqueous common salt liquid level in the buret should be in " zero " scale position; The buret piston is in the position of connecting adsorption tanks; Slowly open the high-pressure valve of adsorption tanks, and when noticing that sensor values decline situation, force value descend about 0.5～0.8Mpa; Close high-pressure valve immediately, adsorption tanks are placed calibration cell inner equilibrium (balance requires the same) again.Mobile leveling bottle reads the desorption of mash gas volume in the buret, and this gas amount is the gas total amount of from adsorption tanks, emitting in twice equalized pressure interval of priority, simultaneously record room temperature and atmospheric pressure at this moment.
4) record adds and next monitoring of putting
After absorption reached balance, software was opened the interpolation writing function automatically.At this moment just can in the entry information dialog box, import gas total amount, room temperature and the atmospheric pressure that has write down.Click " interpolation " button and can finish the test in first equilibrium pressure force, the x sensor--the color of y button becomes grey by redness.Then click the x sensor--the y button begins to monitor the test of second equilibrium point, and the x sensor--the color of y button becomes green by grey again at this moment.
5) repeat above-mentioned steps and carry out next equilibrium point test
Emit the high pressure gas in the adsorption tanks one by one according to above-mentioned steps, write down each corresponding gas amount of emitting and room temperature at that time and atmospheric pressure in the each point adsorption tanks simultaneously, then in the data Input Monitor Connector software.Be the warranty test necessary accuracy, the equilibrium pressure force of high pressure absorption is decided to be 6 points.The criterion of adsorption equilibrium is: sensor monitors to the gas pressure value in half an hour, change and be no more than 0.01Mpa and think that promptly absorption reaches balance.
6) method of operating of last equilibrium point of high pressure adsorption test
The last point pressure of high pressure absorption (the sensor monitors value generally be about 0.5～0.8Mpa) reach balance after; Opening high-pressure valve no longer closes; Make that gas fully enters buret in the adsorption tanks, be issued to balance at atmospheric pressure at last, often move leveling bottle make it with buret in liquid level consistent.The speed of in adsorption tanks, emitting gas is less than 2cm
3During/h, can think that gas absorption reaches balance, equilibration time generally is about 8 hours, at this moment reads buret liquid level scale again and is the gas amount that last point is separated sucking-off, notes room temperature and the atmospheric pressure of this moment simultaneously.Then in gas amount, room temperature and the atmospheric pressure Input Monitor Connector software of record.Software will point out the high pressure adsorption test to finish, and button is promptly accomplished the high pressure adsorption test of this coal sample to confirm logging data errorless back click " to finish high pressure absorption ".
8. test findings output
After the high pressure adsorption test finishes; Can carry out result's output, click " obtaining test findings " function button, in the message box that demonstrates; Select the coal sample number dialog box, the coal sample number drop-down list box has been listed all coal sample numbers that are in the process of the test.When the coal sample listed accomplish the essential information of high pressure adsorption experiment and input complete after, click " obtaining test findings " button below the coal sample number, software will calculate and demonstrate test findings and adsorption isothermal curve to the information of typing automatically.
In above operation, have some to require and points for attention:
(1) before beginning to do experiment, certain impermeability, particularly adsorption tanks of wanting earlier check system packed into after the coal sample before not outgasing, and whether the high pressure gas gas checking system that must charge into more than the 4Mpa leaks gas.
(2) adsorption tanks place 30 ℃ water bath with thermostatic control (adsorption temp also can look require alternative) all the time in the adsorption test
(3) but take out in the adsorption tanks self-constant temperature groove during switch high-pressure valve, but should put back in the calibration cell immediately subsequently.
(4) when low pressure absorption and high pressure absorption last point desorption gas; Should note often moving leveling bottle; Make it with buret in liquid level be consistent (promptly making it and the atmospheric pressure balance); Liquid level differs big and (when the water surface＞100mm, mercury＞10mm), just allows reading after should making the consistent 0.5h of liquid level at least again when reading.
(5) read for the last time in the buret in the gas values in the operation of per step, read room temperature t and atmospheric pressure pd, for correcting gas volume to standard state usefulness, room temperature should be measured near buret, makes it as far as possible near the buret temperature.
(6) outgasing and during the low pressure adsorption test, using a label and be attached on the pressure transducer, can prevent of the influence of the water vapor of constant temperature oven like this, otherwise possibly reduce the sensor sample precision and damage sensor pressure transducer.
Explanation is at last; Above embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model; And not breaking away from the aim and the scope of present technique scheme, it all should be encompassed in the middle of the claim scope of the utility model.
Claims (7)
1. high pressure content method gas adsorption system, it is characterized in that: said system comprises the adsorption tanks that are used for the splendid attire test sample, also comprises inflation subsystem, degassing subsystem, absorption measurement subsystem and data acquisition process subsystem;
Said inflation subsystem comprises the high pressure gas bottle and the jar that reduces pressure, and the gas in the said high pressure gas bottle is through decompression jar outside output;
Said degassing subsystem comprises vacuum extractor and ultra thermostat, and said vacuum extractor links with the gas delivery port of decompression jar, is used for adsorption tanks are outgased; Said ultra thermostat is used for making the adsorption tanks of the degassing to keep constant temperature;
Said absorption measurement subsystem comprises Water Tank with Temp.-controlled, high pressure absorption buret and low pressure absorption buret; High pressure absorption buret capacity can carry out the high pressure desorption gas flow and measure greater than 1000ml; Said low pressure absorption buret can carry out the quantitative determination of low pressure minimum gas adsorption-desorption, and high pressure absorption buret and low pressure absorption buret all are furnished with equilibration flask, avoid influence of atmosphere pressure;
Said data acquisition process subsystem comprises data acquisition gland bonnet, data sampler and computer processing unit; Said data acquisition gland bonnet is used for adsorption tanks are sealed; Said data acquisition gland bonnet is provided with high pressure valve and pressure transducer; Said high pressure valve is used for being connected with the gas output end of decompression jar; The signal output part of said pressure transducer is connected with the signal input part of data sampler, and the signal output part of said data sampler is connected with computer processing unit.
2. high pressure content method gas adsorption system according to claim 1; It is characterized in that: said vacuum extractor comprises vacuum tank road device, vacuum unit, vacuum gauge and vacuum meter; Said vacuum unit is connected to vacuum meter through vacuum diaphragm valve, the vacuum gauge that connects successively, and is connected through the gas output end of vacuum tank road device with the decompression jar.
3. high pressure content method gas adsorption system according to claim 1 and 2 is characterized in that: said system also comprises and is used for meausring apparatus that sample is weighed.
4. the high pressure content method gas adsorption system of stating according to claim 3, it is characterized in that: said system also comprises drying unit.
5. high pressure content method gas adsorption system according to claim 4, it is characterized in that: said drying unit is a vacuum drying chamber.
6. high pressure content method gas adsorption system according to claim 4, it is characterized in that: the maintenance temperature of said ultra thermostat is 60 ℃, the maintenance temperature of said Water Tank with Temp.-controlled is 30 ℃.
7. high pressure content method gas adsorption system according to claim 1, it is characterized in that: said data acquisition process subsystem also comprises printing equipment.
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| CN102841192A (en) * | 2012-09-25 | 2012-12-26 | 成都理工大学 | Desorption analysis experimental facility of coal rock |
| CN102901803A (en) * | 2012-10-24 | 2013-01-30 | 河南理工大学 | Water-gas two-phase adsorption-desorption-seepage experimental system and method for loaded coal containing methane |
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- 2011-08-30 CN CN 201120321037 patent/CN202256094U/en not_active Expired - Lifetime
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| CN110726640B (en) * | 2019-11-18 | 2022-05-17 | 中煤能源研究院有限责任公司 | Automatic determination device for coal sample gas adsorption constant |
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